chore: add nx generator

[zrosenbauer]

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Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://voltagent.dev/docs/community/contributing/#commit-convention

Bugs / Features

• Related issue(s) linked
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What is the current behavior?

What is the new behavior?

fixes (issue)

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[changeset-bot]

⚠️ No Changeset found

Latest commit: 2347b7b

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[omeraplak]

🚀

[baseballyama]

It’s great that a template is provided! I’d love to see this completed and merged.
I left a few comments on things I happened to notice.

[zrosenbauer]

@omeraplak no changeset for internal work